The term, elder, has a wider range than the term, bishop. Elder may refer to Old or New Testament offices. It may also refer to men of age, experience, and/or wisdom. Bishop refers to a specific New Testament office.
In 2 Samuel 7, why was David picked to be king? Why he was labeled as the man after God's heart?
What does the Bible say about men going to school to be a preacher?
In Matthew 2:23 it says "And he came and dwelt in a city called Nazareth: that it might be fulfilled which was spoken by the prophets, He shall be called a Nazarene."
Did John the Baptist baptize Gentiles or only Jews?
